Delay bookmarks load while the profile is loading.

chrome/browser/bookmarks/bookmark_model.cc

Index: chrome/browser/bookmarks/bookmark_model.cc
diff --git a/chrome/browser/bookmarks/bookmark_model.cc b/chrome/browser/bookmarks/bookmark_model.cc
index 52533b4c2be72210353f7fc5c17cb7d33441eae5..e7b3bb1f698bc5214112b3bdff1efdd72e3d801a 100644
--- a/chrome/browser/bookmarks/bookmark_model.cc
+++ b/chrome/browser/bookmarks/bookmark_model.cc
@@ -9,6 +9,7 @@
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
+#include "base/deferred_sequenced_task_runner.h"
 #include "base/json/json_string_value_serializer.h"
 #include "base/sequenced_task_runner.h"
 #include "base/string_util.h"
@@ -250,10 +251,14 @@ void BookmarkModel::Load() {
                  content::Source<Profile>(profile_));
 
   // Load the bookmarks. BookmarkStorage notifies us when done.
-  store_ = new BookmarkStorage(profile_, this, profile_->GetIOTaskRunner());
+  store_ = new BookmarkStorage(profile_, this, GetBookmarkTaskRunner());
   store_->LoadBookmarks(CreateLoadDetails());
 }
 
+void BookmarkModel::StartLoading() {
+  GetBookmarkTaskRunner()->Start();
+}
+
 bool BookmarkModel::IsLoaded() const {
   return loaded_;
 }
@@ -961,3 +966,12 @@ BookmarkLoadDetails* BookmarkModel::CreateLoadDetails() {
                                  new BookmarkIndex(profile_),
                                  next_node_id_);
 }
+
+scoped_refptr<base::DeferredSequencedTaskRunner>
+    BookmarkModel::GetBookmarkTaskRunner() {
+  if (!bookmark_task_runner_) {
+    bookmark_task_runner_ =
+        new base::DeferredSequencedTaskRunner(profile_->GetIOTaskRunner());

[tfarina, 2013/03/28 22:57:01]

Can we do something similar to |blocking_task_runner_| of
chrome/browser/chromeos/drive/drive_system_service.cc?

[msarda, 2013/03/29 14:40:03]

I think so. We should probably have a similar start-up task runner for the
drive_system_service.cc. This will be done in a subsequent CL (this is already
starting to be toooo long).

On 2013/03/28 22:57:01, tfarina wrote:

+  }
+  return bookmark_task_runner_;
+}